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Structural Monitoring and Maintenance
  Volume 6, Number 2, June 2019 , pages 103-124
DOI: https://doi.org/10.12989/smm.2019.6.2.103
 

The reason of cracking in bottom gallery of SefidRud Buttress Dam and earthquake and post earthquake performance
Hasan Mirzabozorg, Mohsen Ghaemian and Amirhossein Roohezamin

 
Abstract
    Present study concerns the safety evaluation of SefidRud dam\'s block No. 18 regarding probable crack propagation in the foundation gallery under a MCE record. Accordingly, a 3D finite element model of the block in companion with the reservoir and the foundation is modeled. All the associated thermal and structural parameters are derived via calibration with the records of thermometers and pendulums installed inside the dam body. The origination of the cracks and their whereabouts are determined by primary thermal and static analyses and through a linear dynamic analysis the potential failure zone and their extent and level are studied. The foundation gallery is the most probable zone among the other intensive tensile stress area to compromise the dam stability. Therefore, the nonlinear analysis of this risky region is inevitable. The results depict the permissible expansion of the cracks inside the gallery even under another future earthquake in MCE level. As a consequence, the general dam performance is assessed safe in spite of the seepage flow rate growth from the gallery fractures.
 
Key Words
    Buttress dam; calibration; cracked Initial condition; post earthquake stability; SefidRud dam
 
Address
Hasan Mirzabozorg and Amirhossein Roohezamin: Department of Civil Engineering, K. N. Toosi University of Technology, Valiasr Avenue, Tehran, Iran
Mohsen Ghaemian:Department of Civil Engineering, Sharif University of Technology; Azadi Avenue,
P.O. Box 11365-9313, Tehran, Iran
 

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